Will the Zhangs ever win a World title?

The Zhangs about 5 years ago were seen as the future of pairs skating, a team that would win many World titles and probably the 2010 Olympics. Now it looks like their best days might be behind them altogether with still not truly reaching the pinnacle of the sport. They havent been competitive with the Germans (barring a major self destruction by the Germans) since fall 2007 atleast. They have been displaced by Pang & Tong in China for the first time in awhile, and Sui & Han are already making their mark as seniors and threatening to take over as the next Chinese #1. There are also a growing collection of top teams from Russia. And last year saw the Zhang's PCS plummet even for good skates.